Ackerman Nunatak () is an isolated nunatak, 655 metres (2,149 ft) high, standing 6.5 miles (10 km) south-southeast of Butler Rocks in northern Forrestal Range, Pensacola Mountains. Mapped by United States Geological Survey (USGS) from surveys and U.S. Navy air photos, 1956–66. Named by Advisory Committee on Antarctic Names (US-ACAN) for Thomas A. Ackerman, aerographer, Ellsworth Station winter party, 1957.
This article incorporates public domain material from the United States Geological Survey document "Ackerman Nunatak" (content from the Geographic Names Information System).